JP4788984B2 - Tonearm and record player - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a tone arm suitable for a record player used for a disc mug (hereinafter simply referred to as DJ), and a record player using this tone arm.
[0002]
[Prior art]
In record players used for DJs, so-called scratch performance operations are widely used. In this operation, sound is output by directly rotating the record board in the forward and reverse directions by the operator's finger operation.
[0003]
In this way, it is possible to artificially create new sound information by manually rotating the record forward and backward with a fingertip directly. In this case, the sound information of the record player can be mixed with the sound information from other various sound generation sources (instrument etc.) attached, and as if it were a single musical instrument as a means of creating a new sound source. Can be handled.
[0004]
In order to prevent the needle of the record needle from jumping when the record is forwardly and reversely rotated in this way, a linear tone arm is known. Conventionally, a record player is installed horizontally. That is, the turntable is leveled and the needle arm is given stylus pressure by its weight. This needle pressure is controlled by adjusting the weight and position of the balance weight.
[0005]
[Problems to be solved by the invention]
In the above-mentioned scratch performance operation in DJ, the operator turns the record forward and backward with the fingertip or frequently changes the record, so that it may be difficult to operate if the player is fixed at the horizontal position.
[0006]
In this case, it is conceivable to tilt the record player. However, if this is done, there is a problem in that the needle pressure changes and needle skipping easily occurs. In general, the height of the record player is fixed, but the height varies depending on the operator. Therefore, depending on the operator, it may be difficult to operate on a horizontal turntable.
[0007]
In addition, the operator usually makes gestures in accordance with the music, but there are problems that it becomes difficult to perform gestures and the performance is restricted when the turntable is horizontal.
[0008]
This invention has been made in view of such circumstances, provide a tone arm haritobi has Kuku to occur during the case, for example, the scratch operation by tilting the record player in DJ to use inclined record player This is the first purpose. Also provided is a record player that makes it easy for the operator to operate during scratch operation in DJ, and adjusts the tilt of the record player when the operator's height or the like changes or the gesture is applied. This is the second purpose.
[0009]
[Means for Solving the Problems]
This object according to the present invention is a tone arm for use in the turntable and the record player by tilting the support table mounting the tone arm, a rotatable pivot ring perpendicular vertical shaft rotation with respect to Turn-down table ;
A linear arm member that is held by the pivot ring and that is orthogonal to the horizontal support shaft that crosses the vertical support shaft at right angles and extends substantially parallel to the turntable;
A first weight attached to the opposite side of the cartridge attached to the tip of the arm member across the horizontal support shaft of the arm member and balancing the weight around the horizontal support shaft of the arm member;
Displaced downward than the arm member and a horizontal support shaft, one end of which is connected to the arm member between the horizontal support shaft and the cartridge, the other end resilient needle pressure applying coupled to the pivot ring With materials;
This is achieved by a tone arm characterized by comprising:
[0010]
In this case, in order to prevent an adverse effect due to the weight of the elastic material, a second weight is preferably added to the tone arm. In this case, the second weight is provided with an elastic material on one side of the vertical surface including the arm member and the vertical support shaft, and is disposed so as to balance the weight with the elastic material with the vertical surface interposed therebetween.
[0011]
The second weight is preferably positionable at the position (first position) and a second position that balances the weight of the elastic member with the arm member interposed therebetween. When the second weight is placed at the first position, the horizontal force acting on the tone member can be canceled when the record player is placed horizontally.
[0012]
When placed in the second position, the weight in the circumferential direction centering on the arm member is balanced when viewed from the length direction of the arm shaft. For this reason, when the inclination of the player is changed, the force acting on the arm member does not change, the needle jump is prevented, and the needle pressure is kept constant. If the second weight can be fixed at an arbitrary position between the first position and the second position, it is possible to set a suitable performance state corresponding to the change of the tilt of the turntable and the performance condition. It becomes possible.
[0013]
If the tension of the elastic material can be adjusted, the needle pressure can be easily adjusted in accordance with performance conditions. In this case, a coil spring is preferably used. This is because the coil spring is less affected by the use environment and has stable performance.
[0014]
According to the present invention, a second object of the present invention is a record player using the tone arm according to any one of claims 1 to 4, wherein the tilt angle of the support table to which the turntable and the tone arm are attached is variable. Achieved by a record player.
[0015]
In this case, two or more support bases can be provided so as to be swingable around a common swing axis. In this case, if a controller is provided between different support bases, operability is good. If the inclination of the controller is variable, the operability is better.
[0016]
Embodiment
FIG. 1 is a side view showing a tone arm according to an embodiment of the present invention, FIG. 2 is an enlarged view showing a part of the main portion, FIG. 3 is a perspective view in the vicinity of a pivot portion (support portion), and FIG. 2 is a sectional view taken along line IV-IV in FIG. 2, FIG. 5 is a view showing a state where the second weight is in the first position in FIG. 4, and FIG. 6 is a perspective view of a record player using this tone arm.
[0017]
In FIG. 1, reference numeral 10 denotes a support base of the record player A (FIG. 6). A tone arm 12 and a turntable B shown in FIG. A tone arm attachment hole 14 is formed in the support base 10, and the tone arm 12 is attached thereto.
[0018]
The tone arm 12 includes a bearing base 18 attached to the support base 10 via a rubber vibration isolator 16, an armrest support arm 22 fixed to the bearing base 18, and an axis perpendicular to the bearing base 18 (support base 10 A pivot ring 24 held so as to be rotatable about a vertical axis (vertical support shaft) 20, and a horizontal axis (horizontal support shaft horizontal to the support base 10) 26. It has a swingable arm member 28 and the like. The arm member 28 is made of a straight pipe.
[0019]
A pivot portion (support portion) for supporting the arm member 28 on the bearing base 18 is configured as follows (see FIG. 3). That is, the pivot ring 24 is held by the bearing stand 18 so as to be rotatable around the vertical support shaft 20. A pair of support arms 24a and 24b are erected on the pivot ring 24, and an annular portion 30 (30a and 30b) surrounding the outside of the support arms 24a and 24b is formed on the arm member 28 side. The annular portions 30a, 30b and the support arms 24a, 24b are connected by an axis passing through the common horizontal support shaft 26 in a state where the arm member 28 is placed between the support arms 24a, 24b.
[0020]
As a result, the arm member 28 rotates in the horizontal direction around the vertical support shaft 20 and swings up and down around the horizontal support shaft 26. Here, the vertical support shaft 20 and the horizontal support shaft 26 are orthogonal to each other. The horizontal support shaft 26 passes through the central axis 28 </ b> A of the arm member 28 or the vicinity thereof and is orthogonal to the arm member 28. That is, the central axis 28A of the arm member 28, the horizontal support shaft 26, and the vertical support shaft 20 are orthogonal to each other and intersect at almost one point.
[0021]
A cartridge attachment shell 32 is fixed to one end of the arm member 28, and a cartridge 34 (see FIG. 6) is attached thereto. A first weight 36 is attached to the other end of the arm member 28. The first weight 36 is movable along the central axis 28A of the arm member 28, and the fixed position is variable. An armrest 38 is attached to the tip of the armrest support arm 22, and the middle of the arm member 28 on the cartridge attachment shell 32 side can be fixed to the armrest 38.
[0022]
Next, the needle pressure adjusting mechanism 40 will be described. 2, 4, and 5, the mechanism 40 includes a fixed arm 42 fixed between the armrest 38 of the arm member 28 and the pivot portion, and a spring-loaded pipe fixed to the lower end of the fixed arm 42. 44. The fixed arm 42 is inclined to the right side with respect to the vertical surface 46 when viewed from the distal end side (cartridge mounting shell 32 side) of the arm member 28, that is, on the opposite side to the turntable B (FIG. 6) (FIGS. 4, 5). ).
[0023]
The spring loading pipe 44 is parallel to the arm member 28, and one end thereof opens toward one support arm 24 a of the pivot ring 24. A cylindrical slider 48 can slide in the spring loading pipe 44. A slit 50 is formed on the side surface of the spring loading pipe 44 in the longitudinal direction. A screw 52 for position adjustment can be screwed into the slider 48 from the outside through the slit 50. If the screw head 52a of the screw 52 is rotated to the right with the fingertip, the tip of the screw 52 passes through the slider 48 and comes into contact with the inner surface of the spring loading pipe 44, thereby fixing the slider 48 at an arbitrary position. Can do.
[0024]
A coil spring 54 as an elastic material is loaded in the spring loading pipe 44. One end of the coil spring 54 enters the slider 48 and is locked by a screw 52 that traverses the slider 48. The other end of the coil spring 54 is connected to the support arm 24 a of the pivot ring 24 by a wire 56. That is, the wire 56 is passed through the pore formed in the support arm 24 and is locked to the other end side of the pore.
[0025]
Therefore, if the screw 52 is turned counterclockwise and the tip of the screw 52 is separated from the inner surface of the pipe 44, the screw 52 and the slider 48 can move along the slit 50. At this time, since the tension amount of the coil spring 54 changes, the tension of the wire 56 also changes. Then, if the screw 52 is turned to the right to press the tip of the screw 52 against the inner surface of the pipe 44, the screw 52 and the slider 48 are fixed in the pipe 44. In this way, the tension of the coil spring 54 can be adjusted.
[0026]
Since the coil spring 54 is displaced downward from the arm member 28 and is stretched substantially parallel to the arm member 28, the tension of the coil spring 54 imparts a downward restoring force to the arm member 28. That is, the needle pressure is applied to the record needle of the cartridge 34 (FIG. 6).
[0027]
The arm member 28 is provided with a second weight 58 for balancing the weight of the needle pressure adjusting mechanism 40 configured as described above. The second weight 58 is fixed to the distal end (rotating end) of the movable arm 60 that can rotate with an appropriate resistance to the arm member 28 adjacent to one side surface of the fixed arm 42. The fulcrum side of the movable arm 60 is in a notch 62 (see FIG. 2) formed on one side of the fixed arm 42, and two locking surfaces 60a and 60b provided on the outer periphery of the movable arm 60 on the fulcrum side. and by abutting the locking surface 62a provided in the notch 62 of the fixed arm 42 is positionable in a first position P ₁ and the second position P _2.
[0028]
The second weight 58 and the movable arm 60 balance the weight of the needle pressure adjusting mechanism 40, and the position of the center of gravity of the arm member 28 in the longitudinal direction coincides with the position of the center of gravity of the needle pressure adjusting mechanism 40. The center of gravity of the second weight 58 and the movable arm 60, when in a first position P ₁ located at the symmetrical positions of the center of gravity of the needle pressure adjusting mechanism 40 across the vertical plane 46.
[0029]
Furthermore the center of gravity of the second weight 58 and the movable arm 60, when in the second position P ₂ is in the symmetrical position of the center of gravity of the needle pressure adjusting mechanism 40 with respect to the center axis 28A of the arm member 28. The first weight 36 has the needle pressure zero when the needle pressure adjusting mechanism 40, the second weight 58, etc. are attached and the tension of the coil spring 54 of the needle pressure adjusting mechanism 40 is set to zero. The fixed position is set as follows.
[0030]
As shown in FIG. 6, the tone arm 12 is attached to the support base 10 together with the turntable, and is used as a record player A. Here, the support base 10 can swing around a horizontal swing shaft 64 and can be fixed by changing the tilt angle.
[0031]
Next, the adjustment procedure in this embodiment will be described. Position indicating a second weight 58 in FIG. 5 when using the support base 10 and horizontally fixed, i.e. the first position P _1. In this state, the balance between the needle pressure adjusting mechanism 40 and the second weight 58 is maintained with the vertical surface 46 interposed therebetween. For this reason, these weights are located below the tone arm 28, and the rotational force with respect to the central axis 28A of the tone arm 28 is not generated, so that the tone arm 28 is stabilized. In other words, the needle pressure adjusting mechanism 40 and the second weight 58 are stabilized in a balance-like shape (sloppy shape) around the tone arm 28.
[0032]
In this state, the tension of the coil spring 54 of the needle pressure adjusting mechanism 40 is made zero, and the first weight 36 is adjusted so that the needle pressure at this time becomes zero. Then, if the screw 52 of the needle pressure adjusting mechanism 40 is moved to increase the tension of the coil spring 54, the needle pressure can be set only by the tension of the coil spring 54.
[0033]
When the inclination angle of the support base 10 is changed according to the preference of the operator and is fixed at an angle that is not horizontal, the second weight 58 is rotated and fixed at the _second position P2. In this state, since the weight balance around the central axis 28A of the arm member 28 is completely maintained, the needle pressure is not affected at all by the inclination angle of the support base 10, and the needle pressure is set by the coil spring 54. Always kept at high pressure. Therefore, it is possible to change the inclination angle of the support base 10 during performance.
[0034]
Note the actual use, the second weight 58 may be used to secure at any position between the first position P ₁ and the second position P _2. In this case it is possible obtaining a combined effect when placed in position P ₂ effects a second when placed in a first position P _1.
[0035]
[Other Embodiments]
FIG. 7 is a perspective view of a record player according to another embodiment. This embodiment uses two record players A shown in FIG. These record players A can be tilted around a common horizontal swing shaft 64, and can be fixed at different angles. A controller C is arranged between the record players A and A. Here, the controller C can also be fixed by changing the angle around the swing shaft 64.
[0036]
Since the controller C is provided with an adjustment knob for adjusting the volume of the two record players A and A and a knob for changing the mixing ratio of both sounds, the angle between the two record players A and A and the controller C is preferred. By setting this angle, the operator can operate with a more favorite posture.
[0037]
[Other Embodiments]
FIG. 8 is a perspective view of a record player according to another embodiment. In this embodiment, the record player A shown in FIG. 6 can be set to a steep angle including the vertical position or close to the vertical. The tilt angle of the support base 10 is the same as that shown in FIGS. 6 and 7 in that it can be changed around the horizontal swing shaft 64.
[0038]
According to this embodiment, since the support base 10 can be set to an angle close to vertical, the installation floor area of the record player A is reduced, which is suitable for use in a narrow place.
[0039]
【The invention's effect】
As described above, the first aspect of the invention of the first aspect provides the first weight to the linear arm member so that the needle pressure can be set to zero by balancing the weight around the horizontal support shaft horizontal to the turntable, Since an elastic material for applying a needle pressure is provided below the arm member, the needle pressure can be set by this elastic material. For this reason, when using in a state where the turntable is tilted, for example , even when the DJ is tilted with a DJ and a scratch operation is performed, needle skipping hardly occurs. In this way, when the turntable is tilted, it becomes difficult for needle skipping to occur.
[0040]
In this case, if the elastic material is displaced to one side of the vertical surface including the arm member and the second weight is provided on the other side to balance the weight of the elastic material with the vertical surface interposed therebetween, Stability is improved (claim 2). If the second weight can be moved to a position where the elastic member is symmetrical with the arm member in between, the weight balance in all directions of the arm member can be obtained and the needle pressure can be applied only by the elastic member. The needle pressure can be kept constant without being affected by the tilt angle of the turntable. It is desirable that the elastic material be adjustable as a coil spring (claim 4).
[0041]
The record player using the tone arm can easily perform by setting the angle desired by the operator if the stand (support stand) is variable in inclination angle. If the two record players can be swung around a common rocking axis, the performance becomes easier when two record players are used. In this case, if the controller is arranged between the two record players so that the controller can swing about the same swinging shaft, the operator can easily operate the controller.
[Brief description of the drawings]
FIG. 1 is a side view of a tone arm according to an embodiment of the present invention. FIG. 2 is an enlarged view of a part of the main portion. FIG. 3 is a perspective view of the vicinity of a pivot portion. FIG. 5 is a cross-sectional view taken along line IV. FIG. 5 is a diagram in which the position of the second weight is changed in FIG. 4. FIG. 6 is a perspective view of a record player. A perspective view showing an embodiment [Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Support stand 12 Tone arm 20 Vertical support shaft 24 Pivot rings 24a and 24b Support arm 26 Horizontal support shaft 28 Arm member 28A Center shaft 36 First weight 40 Needle pressure adjustment mechanism 42 Fixed arm 46 Vertical surface 54 Coil as elastic material Spring 58 Second weight 60 Movable arm 64 Swing axis A Record player B Turntable C Controller

Claims (7)

A tone arm used for a record player with a tilted support base to which a turntable and a tone arm are attached,
A pivot ring pivotable about a vertical spindle perpendicular to the turntable;
A linear arm member that is held by the pivot ring and that is orthogonal to the horizontal support shaft that crosses the vertical support shaft at right angles and extends substantially parallel to the turntable;
A first weight attached to the opposite side of the cartridge attached to the tip of the arm member across the horizontal support shaft of the arm member and balancing the weight around the horizontal support shaft of the arm member;
Displaced downward than the arm member and a horizontal support shaft, one end of which is connected to the arm member between the horizontal support shaft and the cartridge, the other end resilient needle pressure applying coupled to the pivot ring With materials;
A tone arm characterized by comprising:   The elastic material for applying the needle pressure is displaced to one side of the vertical surface including the arm member and the vertical support shaft and is disposed in parallel with the arm member, and the arm member is displaced to the other side of the vertical surface. The tone arm according to claim 1, further comprising: a second weight that is arranged in a weight and balances weight with the elastic material for applying the needle pressure across the vertical surface.   The second weight is rotatable about the arm member, and has a first position that balances the weight with the elastic material across the vertical plane and a weight balance between the elastic member and the arm member. 3. The tone arm according to claim 2, wherein the tone arm is positionable to two positions. Elastic member is a coil spring, one of the tone arm of claims 1 to 3 having a needle pressure adjusting mechanism for enabling adjustment of the tension.   A record player using the tone arm according to any one of claims 1 to 4, wherein a tilt angle of a support table to which the turntable and the tone arm are attached is variable.   6. The record player according to claim 5, wherein the two support bases to which the turntable and the tone arm are attached are provided on a common swing shaft while being shifted in the axial direction, and a controller is provided between the two support bases.   7. The record player according to claim 6, wherein the controller has a variable inclination angle around the swing axis.

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